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I. D. BUSH. Combined Door Bolt and Check.

No. 223,477. Patented Ian. 13, 1880 INVENTOR ETEM PHOTO UI'HOGRAPMER.WASHINGTON, D, 0.

TORNEYS.

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UNITED STATES PATENT OFFICE.

IRA D. BUSH, OF DETROIT, MICHIGAN, ASSIGNOR TO MARY E. BUSH, OF

- SAME PLACE.

COMBINED DOOR BOLT AND CHECK.

SPECIFICATION forming part of Letters Patent No. 223,477, dated January13, 1880.

Application filed September 15, 1879.

To all whom it may concern:

Be it known that 1, lRA D. BUSH, of Detroit, in the county of Wayne andState of Michigan, have invented a new and Improved Door-Bolt, of whichthe following is a specification.

The object of this invention is to provide a door-bolt which is soarranged that it can operate like an ordinary door-bolt, and will alsohold the door when it is opened a distance equal to the length of thebolt.

The invention consists of a bolt provided with a latch-knob at one end,a guide-slot in the middle, and two vertical projections at the otherend, which bolt fits onto a bolt'case in such a manner that it can bepushed forward and backward on this case and locked when desired.

It also consists of a bar forming an aperture at the end of thebolt-case, and which rests against the knob of the bolt in case the dooris to be held when partially opened.

It further consists of a jamb-catch having sockets into which thevertical projections at the end of the bolt fit, so that the bolt can bepartially rotated in case the door is to be held when partially open.

In the accompanying drawings, Figure 1 is a front view of the bolt, thebolt-case, and the jamb-catch. Fig. 2 is a horizontal cross-sec: tion011 the line y y, representing the door partially opened and held by thebolt. Fig. 3 is a front view of the bolt-case. Fig. 4 is a rear view ofthe bolt. Fig. 5 is a vertical cross-section on the line 00 .10.

Similar letters of reference indicate correspondin g parts.

A represents a metal bolt, provided at its forward end with two verticalprojections, B B, and at its rear end with a sleeve, G, through which asmall shaft, D, passes, provided with a knob, E, on the front side and acircular disk, F, of the same diameter as the height of the bolt, andhaving a projecting catch or flange, G, on the rear side. Thisprojecting catch has a circular edge and fitsinto the two circularsockets H H on the end of the back plate, I.

The bolt A is also provided with a longitudinal slot, J, terminating ina circular opening, K, into which a pin, L, provided with a head, M, andattached to the back plate, 1, passes. The head M extends over the edgesof the slot and holds the bolt up against the case, but permits ofpushing the bolt forward. and backward.

The jamb-catch R is provided with a recess, N, into which the forwardend of the bolt passes when the door is closed and locked, the end ofthe bolt striking the flange O in case an attempt is made to open thedoor. The jamb-catch R is also provided with sockets P 1?, having aslot, Q, at the top and bottom.

The projections B B pass through the slots Q Q, and enter into thesockets P I? when the bolt is shoved forward. A bar, S, at the end ofthe case B embraces the bolt in all its positions, is so constructed asto extend beyond the edge of the door, as is shown in Figs. 1 and 2, israised sufficiently to let the bolt pass between it and the case,aiidfits into the jamb-catch It, as is shown in Fig. 1.

The bolt can be fastened to the door and the jamb-catch to the jamb, asis shown in the drawings, or the bolt may be fastened to the jainb andthe jamb-catch to the door, the

former arrangement being for doors opening a to the inside, and thelatter for those opening to the outside.

The device operates as follows: Assuming that the door is closed and isto be locked, the bolt is pushed in the direction of the arrow at untilthe projections B B have passed into the sockets l? P. The knob E isthen turned until thecatch or locking-flange G has passed into one ofthe sockets H H. By reversing these movements the bolt is unlocked andthe 7 door can be opened. When the bolt is closed,

as described above, it cannot be opened by picking from the outside, forit cannot be moved until the catch G has passed out of the socket H. Incase it is desired to leave the door opened a distance equal to thelength of the bolt the knob is turned until the catch G is intheposition shown in Fig. 4, and the bolt is drawn in the direction ofthe arrow b. It will then rotate in the sockets 1? until the bar S restsagainst the sleeve 0, as is shown in Fig. 2. The end of the bolt is heldin the sockets,

for it can only be removed therefrom when the door is closed, and thebar S prevents the door from being opened any farther, and prevents thebolt from moving in the direction of the arrow 0. When in this positionthe bolt cannot be operated by a person on the outside of the door, forit cannot be rotated or replaced until the door is closed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A door-bolt composed of a back plate, I, sliding bolt A,locking-flange G, sockets H H, bar S, and jainb-catch R, combined andoperating substantially as set forth, whereby the bolt will operate likean ordinary door-bolt, but will also hold the door in apartially-open edposition.

into sockets in a jalnb-catch, substantially as described, whereby thebolt can be partially rotated upon the said vertical projections, as setforth.

3. The jamb-catch It, provided with a recess, N, sockets P P, and slotsQQ, substantially as described, whereby the project-ions at the end ofthe bolt can enter into the sockets, but cannot be removed while thebolt is being rotated, as described.

4. The combination of the jamb-catch R, knob E, bar S, and bolt A,substantially as described, whereby the bar S can rest against the knobE when the bolt is partially rotated upon its vertical projections, asset forth.

IRA DUSETT BUSH.

Witnesses:

THEO. OTJEN, E. J. ENSIGN.

